Smart-key



FIG. 1 is a front and top perspective view of a smart-key with a connection component;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is another front and top perspective view thereof.

The broken lines depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a smart-key, as shown and described. 